------- Comment #15 from iant at google dot com 2007-07-01 01:58 ------- Subject: Re: [4.3 Regression] function with asm() does not setup stack frame
> Adding the stack pointer for asms is certainly the easiest thing to do. I don't know if that is enough. Maybe it is, maybe it isn't. You can't delete the subtraction of the stack pointer if there is any use of any local variable on the frame in any way. If an interrupt occurs, and the stack pointer has not been decremented to be below the local variables, then the local variables will be corrupted by the interrupt handler. > If you think that we want to view mem refs off the frame pointer as if > they also touch the stack pointer, we can do that, but i would ask the > question as to "why just in dce?" I meant it should be done when doing dataflow scanning, not in DCE. I agree there is nothing special about DCE here. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32475
